The two played young girls who seem to find everything repulsive and say as much by declaring “ew.” Lopez was the most recent guest to participate in Fallon’s reoccurring skit “Ew!” Previous guests have included Ariana Grande, Zac Efron and Taylor Swift.

After expressing their horror over their dad and stepdads joining Snapchat, Lopez took the opportunity to dance – which began as an awkward shuffle before turning into a full twerk once Fallon played a faster beat.

After shedding her awkward teen persona, Lopez spoke to Fallon about her show “Shades of Blue,” where she plays a New York City detective.